@Verena Mona There are no new rules. However, green card holders or US citizens can be pulled over to secondary inspections at POE by the CBP. Given the current political climate, I've read more secondary inspections involve phone searches, in which if one does not cooperate, one can be detained for an inconvenient amount of time for further questioning or searches. In which case, you ask to speak to your lawyer. CBP can not deny entry to green card holders or US citizens, but they can deny visa entries.